War of the Past (Reader Insert)

A metalloid body, of unknown origin, was found by archaeologist and was taken in for studying. Sometime later, you were requested, by your superiors in the science field, to travel to the past to find out who and what it is, where it came from, and how it got there, for they believed that it was made from unknown alien origin because it was made out of metal that doesn't exist. If only you knew the truth of what they discovered from the robot alien's body.